CalculateIRIContinuously
                        Computes the IRI for a continuously increasing
                        segment given a road profile
CalculateIRIperSegments
                        Computes the IRI for fixed length segments
                        (e.g. 100m segments) given a road profile.
CalculateIRIperSegmentsOverlapping
                        Computes the IRI for fixed length overlapping
                        segments (e.g. 100 m segments) with an offset
                        (e.g. 20 m) given a road profile
IRI_COEF_100            precomputed coeficients 100 mm segments (lazily
                        evaluated promise)
IRI_COEF_250            precomputed coeficients 250 mm segments (lazily
                        evaluated promise)
